EngliSH | 27
3.3.2. Motor
The three-phase asynchronous motor consists of an
engine block and the engine shaft with the impeller as-
sembly. The circuit for power supply is designed for the
maximal mechanical performance according to the charac-
teristics or the nameplate of the pump. The cable inlets as
well as the circuit are sealed resistant to jet water towards
the pumped medium. The shaft bearing is carried out by
means of robust, maintenance-free and permanently
lubricated antifriction bearings.
General motor nameplate data
Permitted medium temperature
40°C
Insulation class
B (130°C)
Protection type
IP68
Standard cable length
10 m
Shaft seal
Mechanical seal
Carbon / Ceramic (motor side)
Silicon carbide / Silicon carbide
(pump side)
Storage
one ball bearing (above)
one ball bearing (below)
3.3.3. Monitoring equipment
The unit is equipped with various monitoring security
equipment. The following table shows an overview of the
available options. Depending on the size of the discharge
nozzle, options may vary.
Motor type Motor version
…W...
230V / 1Ph
...D…
400V / 3Ph
…A…
automatic floater
Temperature sensor
In the standard version, the temperature sensors are in-
stalled internally on the motor, so that no special connec-
tions are necessary. After cooling, the motor will automat-
ically restart.
Checking direction of rotation
No check is required for
single-handed
motors, since
these always run in the correct direction.
Three-phas
e motors have the correct direction of rotating
if connected to a clockwise rotating field (U, V, W -> L1,
L2, L3). HOMA switchgears check the circuit for clock-
wise rotating field. If there is no clockwise rotating field,
the red LED flashes. Two phases have to be interchanged
at the input of the switchgear. For smaller pumps the
check can be carried out by observation of the start-jerk.
For this, place the pump vertically onto the floor, slightly
onto the edge and switch on for a short time. When seen
from above, the pump rebounds slightly anticlockwise in
correct direction of rotation.
The direction of rotation is correct if the pump moves an-
ticlockwise, since the motor starts clockwise when seen
from above.
ST
AR
T
REACTION
ROTOR
REACTION
ATTENTION
The
direction of rotation
is correct if the
impeller/propeller rotates
in a
clockwise
manner
when viewing down from
top of the placed unit
ATTENTION
The
start reaction
is
anti clockwise
Warning - rotating impeller!
Do not touch the rotating impeller or do not reach the
pump chamber through the pressure socket! Never
put your hands into the pump chamber or touch the
rotating parts in operating mode. Switch the machine
off and let the rotating parts come to gridlock before
carrying out maintenance work or repair work!
Furthermore it is possible to check the direction of ro-
tation with a ‘motor and phase rotation indicator’. This
measuring device is held towards the engine block of the
running pump from externally and shows the direction of
rotation by means of LED.
Automatic float switch
The float switch is directly connected to the pump cover.
An additional float line is not necessary.
Due to the direct connection of the float switch in
the pump, the pump will automatically turn on if the
switch is manually triggered! Therefore, make sure
that the pump is not connected if you are performing
work on it.
3.3.4. Sealing / Seal housing
The seal is created by a lip seal and a silicon carbide
mechanical seal.
3.3.5. Pump casing
The pump casing is equipped with a DN50 / R2“ IG
pressure connection.
3.3.6. Impeller
The impeller is fixed on the engine shaft which powers
it. The impeller is an open single-blade wheel in the M
version, which is suitable for muddy materials containing
solids or fibrous admixtures.
The vortex impeller is used for the V version. This is suit-
able for gas- or air-containing materials with rough or fi-
brous, stringy components liable to twist.
The free passage depends on the pump type:
•
TP22 : 22mm
•
TP26 : 26mm
•
TP35 : 35mm
